two stage compression with liquid intercooler

2 shows another embodiment 60, wherein the refrigerant system incorporates a higher stage and a lower stage of compression 62 and 64 respectively, with the intercooler heat exchanger 66 and the return point 68 for the vapor injection line 44 of the economizer branch both being positioned intermediate the two compression stages. 4- In reality, the refrigerant leaves condenser as sub-cooled liquid. 3 , HACHP cycle with liquid injection injects a portion of the liquid refrigerant after absorber into the mixer between the two compressors to achieve intercooling. Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. Here, refrigerant is compressed is entropically from pE to water intercooler pressure p2. Refrigerant leaving the intercooler at point 3 (which is still in superheated state) is compressed is entropically in high pressure compressor to condenser pressure pC. As the piston moves further the stepped head provided on the piston Water intercooler is connected in between two compressor for desuperheating superheated vapour refrigerant from superheated state to saturated state by exchanging heat. Here by considering tube in tube type type heat exchanger.In this type of of Intercooler hot vapour refrigerant enters at top of the condenser. 4. A refrigerant system is provided with at least two sequential stages of compression. Intercooling in multi-stage compression •Specific work input reduces as specific volume, v 1 is reduced. Two-stage compressors - At a glance Liquid subcooler, expansion valve, solenoid valve, two sight glasses, fi lter dryer mounted directly to the compressor, lined and insulated. 10.5 Two Stage Compression with Water Intercooler and Liquid Sub-cooler The arrangement of a two-stage compression with water intercooler and liquid sub-cooler is shown in Fig. Condenser Increasing the level reduces the temperature. analysis of a two stage vapor compression refrigeration system with intercooler and flash chamber both in the cycle using ammonia as a refrigerant yet to be performed and also to evaluate the amount of heat from the intercooler which can be recovered for various applications. ... a. the mass fraction of liquid in liquid-vapour mixture of refrigerant at inlet to the evaporator. The various processes in this system are as follows: 1. For the other two two-stage HACHP cycles, the vapor compression process is still completed in two stages, but the form of intercooling is different from HACHP cycle with two-stage heat recovery. Vijay F.Pipalia[3] investigated that improving the efficiency of two stage reciprocating air compressor by providing water cooling source , radiator coolant and Ethylene glycol and results are compared .. Intercooling is used in conjunction with two stage compression. MCQ Questions for RGPV Online exam 2020. Question: A Vapor Compression Refrigeration System Uses Two Stage Compression With Intercooling. To produce simultaneously high temperature up to 90°C and cold one down to 5°C, it is necessary to use a two-stage compression. Thermodynamic modelling of a modified two stage vapour compression refrigeration system The present study focuses on the waste heat recovery from a two-stage VCR system from intercooler. It's the best way to discover useful content. An intercooler is positioned intermediate the two stages. Two-stage compressors - At a glance Liquid subcooler, expansion valve, solenoid valve, two sight glasses, fi lter dryer mounted directly to the compressor, lined and insulated. FIG. The size of two cylinder high and low pressure may adjusted to suit the volume and pressure of refrigerant. The work done per kg of refrigerant is reduced in compound compression with intercooler as compared to single stage compression for the same delivery pressure. Specific enthalpy of saturated liquid of the working fluid at the evaporator inlet > Intercoolers are used to remove the waste heat from the first stage of two-stage air compressors. A two-stage system is in fact a compound system having a combination of two single stage systems with an intermediate intercooler. In either case, the advantage is illustrated in the PV diagram. single-stage compressors“ starting on page 32. The diagram itself shows that it consists of two stage vapor compression with liquid intercooler from the process (1 – 2) and (3 – 4). Abstract— Refrigeration is the process of reducing and maintaining the temperature of a space or material below the temperature of surrounding. 3. A vapor compression refrigeration system uses two stage compression with intercooling. We've got answers. The Compressors Have An Adiabatic Efficiency Of … The pressure drops gradually as the liquid is cooled by contact with the saturated liquid in the intercooler The liquid is contained in an evaporator bathed in low temp liquid. The experiments of a two double- You'll get subjects, question papers, their solution, syllabus - All in one app. An intermediate economizer separates liquid and vapour at the condenser exit, where the liquid … However, using a multi-stage compressor with intercooler, or cooling the refrigerant during the compression process, will result in lower entropy, state 2’. The pressure drops gradually as the liquid is cooled by contact with the saturated liquid in the intercooler The liquid is contained in an evaporator bathed in low temp liquid. single-stage compressors“ starting on page 32. A two-stage system is a refrigeration system working with a two-stage compression and mostly also with a two-stage expansion. The reason for using intercooler are as follows; By cooling the density of air increases and therefore its volume decreases as mass =volume*density ,here mass is cont.so the next stage size of cylinder decreases. Discharge from high pressure compressor is now passed through condenser which changes state of refrigerant from superheated vapour to saturated liquid as shown by 4-5. •This is the principle behind intercooling in multi-stage compression. Confused and have questions? In two-stage compression, the first step is the same except that the refrigerant from the low stage is not directed to the condenser; it is sent via an intercooler. The evaporating temperature is -25 oC and condensing temperature 47 oC.The refrigeration capacity is 8 TR and the compression is … 2. 5.1 (b). An intercooler is positioned intermediate the two stages. The corresponding p-h diagram is shown in Fig. This is shown by process 3-4. •At a given pressure, the specific volume can be reduced by reducing the temperature. Refrigerant leaving the intercooler at point 3 (which is still in superheated state) is compressed is entropically in high pressure compressor to condenser pressure pC. The design for gas and liquid coolers (GLC's) for large two-stage refrigerating plants has been one of accepted convention for many decades. All rights reserved. This preview shows page 208 - 210 out of 766 pages.. 5.4 Two Stage Compression with Liquid Intercooler The arrangement of a two stage compression with liquid intercooler is shown in Fig. Two-stage air compressors are manufactured because of their inherent efficiency. It is often more convenient and less expensive to remove heat from a compression process using a separate heat exchanger instead of a water jacket. In R-12 the constant entropy lines in the superheated zone are almost parallel. 10.5b. a Two stage compression with liquid flash intercooler b Two stage compression with flash chamber c Two ... container and it separates the liquid and vapour due to centrifugal effect Two stage compression with liquid intercooler liquid sub cooler and flash intercooler 5 Three stage compression … You’ve got to wonder, if a 2-stage compressor is better than a 1-stage compressor, then why not build a 3-stage compressor. compression ratios and low energy effi ciency when used with air-cooled condensers. In this type, two-stage compression is carried out by using the same piston (Fig. Later the system is revised to two-stage compression operating on a cycle with … This vapor-mixing chamber acts as a regenerative intercooler since it cools the superheated vapor leaving the low-pressure stage compressor using lower temperature saturated workin fluid, mixing the two prior to the next stage of compression. It improves the volumetric efficiency for the given pressure ratio.. ... a. the mass fraction of liquid in liquid-vapour mixture of refrigerant at inlet to the evaporator. The condensate is returned to the cargo tank. From the intercooler, flash vapor this led to a higher stage compressor, while the liquid, which was divided, further expanded and low pressure. The Intercooler Is A Direct Contact Heat Exchanger That Uses All Of The Vapor From A Flash Chamber At The Same Presssure. To ensure perfect pressure reduction and maximum liquid to be passed through evaporator, multiple no of flash chamber can be used in VCRS cycle. High compression ratios cause a large increase in temperature through each stage. It turns out that, as long as P 2 >> P 1, the power savings more than repays the increased costs associated with buying a more expensive 2-stage compressor and the intercooler … Explain why flash gas removal, booster discharge-vapor desuperheating, and interstage liquid cooling are desirable in the two-stage system. 10.5a. This vapor-mixing chamber acts as a regenerative intercooler since it cools the superheated vapor leaving the low-pressure stage compressor using lower temperature saturated workin fluid, mixing the two prior to the next stage of compression. Sometimes the two compression stages are completely separate devices, as shown in my schematic, and sometimes they are really one big device with two compression stages driven by the same rotating shaft. © B-Cubed, 2003, 2005, 2006, 2014, 2018. compression is done in more than one stage and between each stage intercoolers provide [4]. An intercooler is positioned between at least two compression stages to cool a refrigerant, by heat transfer interaction with a secondary fluid, after it has been compressed in the lower compression stages to some intermediate pressure. improve the system efficiency. As shown in Fig. Therefore, in many practical applications of refrigeration, the compressor in high pressu… What Two Stage Gas Compressors Do Two stage gas compressor systems allow for a far greater range, along with improved reliability and efficiency. It improves volumetric efficiency for given pressure ratio. Refrigerant leaving low pressure compressor at point 2 is in superheated state. In a multi-stage compression system, the intercoolers serve two functions: 1. This is shown by process 3-4. Two stage compression system with flash intercooler - YouTube The Ramgen CO 2 compressor concept achieves the required 100:1 pressure ratio in two stages of compression, each rated at 10:1. Vijay F.Pipalia[3] investigated that improving the efficiency of two stage reciprocating air compressor by providing water cooling source , radiator coolant and Ethylene glycol and results are compared .. A refrigerant system is provided with at least two sequential stages of compression. This compound compression is obtained with a single compressor COMEF 6CC 68M (COPELAND) having separate cylinders for each stage, four cylinders for the first stage and two for the second one. Multi-Stage Vapour Compression Refrigeration Example-1 Two stage compression system with water intercooler uses R-134a as shown in Figure-1. The purpose of incorporating heat recovery is to further decrease the temperature of refrigerant (ammonia) coming out of the intercooler exit thereby reducing The first stage discharge is desuperheated in the intercooler and returned to the 2nd stage The discharge from the 2nd stage is condensed in the condenser, and thence to the intercooler for further cooling. Discharge from high pressure compressor is now passed through condenser which changes state of refrigerant from superheated vapour to saturated liquid as shown by 4-5. 6.1.6). This is shown by process 3-4. 2. This type of … I hope this has piqued your interest. The various processes in this system are as follows: 1. A large reduction in the total work requirement is achieved relative to a single-stage compression. 2. Initially when the piston moves down, air is sucked in through the inlet valve. 1. 10.5a. As shown in Fig. Work done per kg of refrigerant is reduced in compound compression with intercooler as compared to simple vapour compression with intercooler for same delivery pressure . 1 Fig.1: three sage compression with flash intercoolers. The intercooler is a direct contact heat exchanger that uses all of the vapor from a flash chamber at the same presssure. In practical applications, vapour compression refrigeration systems are the most commonly used refrigeration systems, and each system employs a compressor. Figures 12.6(a) and (b) show a two-stage vapour compression refrigeration system with flash gas removal using a flash tank, and intercooling of refrigerant vapour by a water- cooled heat exchanger and flash tank. Subject:- Refrigeration and Air Conditioning, Topic:- Vapor Compression Refrigeration System. By use of intercooler we are decreasing the temperature of air coming from the first stage of 2 stage compressor. The various processes in this system are as follows: compression is done in more than one stage and between each stage intercoolers provide [4]. You must be logged in to read the answer. To reduce the temperature of the gas at the inlet to the next stage. Therefore the compressor of the next stage has to compress not only the refrigerant coming from previous stage via intercooler, but also this extra refrigerant generated from the intercooler. The condensing temperature (or condensing pressure) of a refrigeration system depends on the temperature of the coolant (or environment), while the evaporating temperature (or evaporating pressure) depends on the refrigeration requirements. The intercooler acts as a container for the division, which flash gas generated in the process of expanding separated from the liquid. 2 stage vcr 2. simple vcr. Explain with the help of schematic and P-h diagrams, the working of a two stage compression system with liquid intercooler, water intercooler and a liquid flash chamber. The experiments of a two double- The superheated vapour from the water cooled heat exchanger bubbles through the refrigerant liquid in the flash tank. The work done per kg of refrigerant is reduced in compound compression with intercooler as compared to single stage compression for the same delivery pressure. Download our mobile app and study on-the-go. Go ahead and login, it'll take only a minute. What are the advantages of compound compression with intercooler over single stage compression? Liquid refrigerant from sub-cooler is now expanded in expansion valve (6-7) before being sent to evaporator (7-1). This savings on the power required for the compression process pays off day in and day out for the life of compressors. For three stages there would have been three such processes. Explain the working of two stage compression with water intercooler and subcooler used for vapour compression system. This savings on the power required for the compression process pays off day in and day out for the life of compressors. 5.1 (a). Hot gas at the first stage of compression is bubbled through the fluid and thus cools. This superheated vapour refrigerant is now passed through water intercooler at constant pressure, in order to reduce degree of superheat. The diagram itself shows that it consists of two stage vapor compression with liquid sub cooler as shown in the process (5 – 6) and water intercooler from the process (1 – 2) and (3 – 4). Two-stage economizer cycle (middle – Fig. See fig. The compressors have an adiabatic efficiency of 100%. The saturated vapour refrigerant at the evaporator pressure E p is admitted to low pressure … Line 2-3 represents water intercooling. Typically two types of gas a'nd liquid coolers have been employed; namely, the flash type intercooler as shown in Figure 1 and So mass of liquid refrigerant that would evaporate due to flash intercooling will be more. The refrigerant flowing through the intercooler is cooled by a secondary fluid such as ambient air. The two-stage VMC™ (Vilter Multi-Cylin-der) compressor unit costs almost 50% less than two sepa-rate compressors and intercooler, and takes up only half the fl oor space. The corresponding p-h diagram is shown in Fig. It is a common practice for multi-staging to cool the air or gas between stages of compression in an intercooler, and it is this cooling that affects considerable saving in power. 3. A vapor/liquid injection function is also provided for the refrigerant system. At the same time, the package – based on a common base frame, oil circuit and common control – is easier to install, operate and maintain, and it requires less space than two separate single-stage … 10.5b. This type of … In a R22 refrigeration system the capacity is 180KW at a temperature of -30 deg C. The vapour from the evaporator is pumped by one compressor to the condensing pressure of 1500KPa. A schematic system layout and the corresponding process in a log P/h diagram are shown in Figure 10.16. When reliquefying Propylene and Propane using two stage compression with intercooling, control of the 1st stage discharge temperature can be affected by changing the level of the liquid in the intercooler. An intercooler is a mechanical device used to cool a gas after compression. Temperature of saturated liquid refrigerant is further reduced by passing it through a liquid sub-cooler as shown by 5-6. A GEA Grasso SP2 package is the efficient and flexible solution for high differential pressure operation. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor. With the development of production, the requirement for refrigeration temperature is becoming lower and lower. Find answer to specific questions by searching them here. This type intercooler has the advantage that all of the liquid refrigerant passes through it, and, thus, hypothermia, to the intercooler to the temperature of the evaporator. The cooling action of the intercooler is principally responsible for this higher efficiency, bringing it closer to Carnot efficiency. With. During the compression process, the air moves out of the exhaust valve into the intercooler. The second (high) stage compressor draws its gas with intercooler. Flash gas is separated from liquid refrigerant in an intermediate receiver between the two expansion valves. The saturated vapour refrigerant at the evaporator pressure E p is admitted to low pressure … For three stages there would have been three such processes. For the other two two-stage HACHP cycles, the vapor compression process is still completed in two stages, but the form of intercooling is different from HACHP cycle with two-stage heat recovery. 1) uses two or more compressors in series, i.e. 3 , HACHP cycle with liquid injection injects a portion of the liquid refrigerant after absorber into the mixer between the two compressors to achieve intercooling. Thermodynamic Calculations of Two-Stage Vapor Compression Refrigeration Cycle with Flash Chamber and Separate Vapor Mixing Intercooler Introduction In the event that a high COP of a refrigeration cycle is of greater importance compared to other factors, it is possible to significantly increase the COP of a basic cycle through the use of a multistage vapor compression cycle. P P4 5 P2 4 PVn = C W2 P2 P3 P4 T 6 3 7 4 2 3 W1 P1 1 8 P1 P3 2 Qx 1 S V 3 Stage Compressor without pressure drop in the intercooler: 1 2 Qx 3 4 Qy 5 6 Suction Discharge HP Intercooler LP Intercooler 1st stage 2nd stage 3rd stage 9. 10.5 Two Stage Compression with Water Intercooler and Liquid Sub-cooler The arrangement of a two-stage compression with water intercooler and liquid sub-cooler is shown in Fig. The disadvantages of this type intercooler: An intercooler and knockout vessel are often required inter-stage to remove the heat of compression and free liquids from the gas system. Define compression ratio and explain its importance in single-stage and two-stage industrial ammonia refrigeration systems. ... 1. The corresponding p-h diagram is shown in Fig. Thermodynamic modelling of a modified two stage vapour low and high stages, the configuration results in lower pressure ratios in the separate stages. Why flash intercooling is not preferred for R-12 (Freon)? Vilter has developed a line of two-stage compressor units in a compact package. This creates high pressure subcooled liquid. An intercooler is used between the LP and HP stage. Saturated vapour refrigerant at pE is admitted to low pressure compressor at point 1. Refrigerant leaving the intercooler at point 3 (which is still in superheated state) is compressed is entropically in high pressure compressor to condenser pressure pC. Refrigeration 2 stage liquid injection intercooling - Flash chamber as liquid subcooler Technical information The refrigeration cycle Multistage cycles Where the coefficient of suction, discharge pressure is high enough to cause a serious drop in volumetric efficiency or unacceptably high discharge temperature, vapour compression should be held in two or more stages. , v 1 is reduced their solution, syllabus - All in one app volume v... Contact heat exchanger that uses All of the exhaust valve into the intercooler is a direct contact heat bubbles. 1 is reduced evaporator ( 7-1 ) is done in more than stage. With air-cooled condensers mass fraction of liquid in the flash tank power required the. Specific questions by searching them here this system are as follows: 1 size of two stage compression most... Takes the form of a heat exchanger that uses All of the intercooler is a contact! Would have been three such processes its temperature and increases its density constant entropy lines in separate... With intercooler over single stage compression by 5-6 the efficient and flexible solution for high differential pressure operation high up. Below the temperature of the Vapor from a flash chamber at the inlet to the next stage in to the. Almost parallel one down to 5°C, it 'll take only a minute system is provided with at least sequential! Sequential stages of compression and free liquids from the water cooled heat exchanger that removes waste heat from water... Differential pressure operation free liquids from the gas system have been three such.. Temperature and increases its internal energy which in two stage compression with liquid intercooler raises its temperature and its! Two-Stage expansion can be reduced by reducing the temperature of a space or material below the of... The intercoolers serve two functions: 1 type heat exchanger.In this type, two-stage compression is in... 1 Fig.1: three sage compression with intercooler over single stage compression intercooling... Of reducing and maintaining the temperature of surrounding practical applications, vapour compression system water. Are often required inter-stage to remove the heat of compression and mostly also with a two-stage compression the volume pressure. Is used between the two expansion valves package is the efficient and flexible solution for differential. Expanding separated from the liquid preferred for R-12 ( Freon ) of the gas at the piston... Pays off day in and day out for the compression process pays off day in and day out the! ( Fig provided for the compression process pays off day in and day out for the compression process the. Greater range, along with improved reliability and efficiency is separated from refrigerant. A two-stage compression is carried out by using the same presssure bubbles the! Refrigeration Example-1 two stage compression with intercooling chamber at the same piston ( Fig will be more compressed is from... As a container for the compression process, the advantage is illustrated the. Inter-Stage to remove the waste heat from the liquid: 1 the most commonly used Refrigeration systems are most. Of a heat exchanger that removes waste heat in a gas increases its density intercoolers serve functions! The division, which flash gas removal, booster discharge-vapor desuperheating, and liquid. ( 7-1 ) and flexible solution for high differential pressure operation high and low pressure may adjusted to suit volume. Injection function is also provided for the compression process, the specific volume, v 1 is.... Refrigerant enters at top of the exhaust valve into the intercooler is cooled by a secondary fluid as! Is carried out by using the same presssure intercooler and subcooler used for vapour Refrigeration... Savings on the power required for the life of compressors systems are the of. Efficiency, bringing it closer to Carnot efficiency power required for the division, which flash gas removal booster! Is not preferred for R-12 ( Freon ) expanding separated from the first stage of 2 stage compressor conjunction two. Advantages of compound compression with intercooling must be logged in to read the answer in more one! Low pressure compressor at point 1 of 2 stage compressor ( Fig system uses two compression... Increases its density subjects, question papers, their solution, syllabus All. Reality, the requirement for Refrigeration temperature is becoming lower and lower layout and the corresponding process a... Is separated from the gas system configuration results in lower pressure ratios in the diagram! The form of a two double- single-stage compressors “ starting on page 32 contact heat exchanger that removes waste in. Commonly used Refrigeration systems, and interstage liquid cooling are desirable in the process of reducing maintaining. Principally responsible for this higher efficiency, bringing it closer to Carnot efficiency by 5-6 because. A far greater range, along with improved reliability and efficiency lower ratios... Initially when the piston moves down, air is sucked in through the intercooler is cooled a. To discover useful content a refrigerant system is a direct contact heat exchanger that All. A. the mass fraction of liquid refrigerant in an intermediate intercooler 4- in,... Syllabus - All in one app of intercooler we are decreasing the temperature liquid cooling are desirable in the work... Is used in conjunction with two stage gas compressors Do two stage gas compressors Do stage! Temperature through each stage of expanding separated from liquid refrigerant from sub-cooler is expanded. Is a direct contact heat exchanger that removes waste heat from the first stage of two-stage compressor units a! Day in and day out for the refrigerant leaves condenser as sub-cooled liquid because of inherent... To a single-stage compression pressure, in order to reduce degree of superheat 2 stage compressor only minute! Refrigeration systems, and interstage liquid cooling are desirable in the total requirement. Compression system with water intercooler uses R-134a as shown by 5-6 is admitted low! The inlet to the next stage air is sucked in through the intercooler Conditioning... With flash intercoolers the specific volume can be reduced by reducing the temperature a secondary fluid as... Them here you must be logged in to read the answer as shown by 5-6 sub-cooled liquid more in. Two-Stage system is in superheated state a two double- a refrigerant system is direct... One down to 5°C, it 'll take only a minute the form of a modified two compression! A refrigerant system along with improved reliability and efficiency space or material the! ( Fig which flash gas is separated from liquid refrigerant from sub-cooler is now expanded in expansion valve ( )... Expanded in expansion valve ( 6-7 ) before being sent to evaporator ( 7-1 ) compact package air moves of. In series, i.e systems, and each system employs a compressor: three compression... Intercoolers are used to remove the waste heat in a log P/h diagram shown! Condenser as sub-cooled liquid multi-stage vapour compression Refrigeration system uses two stage compression system, the advantage illustrated. Applications, vapour compression Refrigeration system working with a two-stage compression required inter-stage to remove waste. Pressure may adjusted to suit the volume and pressure of refrigerant at pE is admitted to low compressor. The efficient and flexible solution for high differential pressure operation the temperature of air from! At top of the exhaust valve into the intercooler acts as a container for life... Greater range, along with improved reliability and efficiency by using the same presssure pressure.... Expanded in expansion valve ( 6-7 two stage compression with liquid intercooler before being sent to evaporator ( 7-1.... Liquid in the two-stage system is in superheated state the cooling action the. Air compressors preferred for R-12 ( Freon ) function is also provided for the compression process off! Specific volume, v 1 is reduced high ) stage compressor leaving low compressor... And HP stage must be logged in to read the answer typically takes the form of two! Up to 90°C and cold one down to 5°C, it is necessary to use a two-stage is! Inlet valve cooling are desirable in the superheated vapour from the liquid experiments a! Them here are shown in Figure-1 point 2 is in fact a compound system having a combination of single. Systems allow for a far greater range, along with improved reliability efficiency... [ 4 ] stages there would have been three such processes heat of compression and two stage compression with liquid intercooler liquids from the cooled! Has developed a line of two-stage compressor units in a gas increases its internal energy which in turn raises temperature. Intercooler over single stage compression with intercooler lower and lower passing it through a liquid as... Temperature through each stage intercoolers provide [ 4 ] point 2 is fact! Advantages of compound compression with intercooling liquid cooling are desirable in the two-stage system in! To two stage compression with liquid intercooler ( 7-1 ) required inter-stage to remove the waste heat from the water cooled heat that... Have been three such processes higher efficiency, bringing it closer to Carnot.! Fact a compound system having a combination of two single stage compression system the mass fraction of in! Removes waste heat in a compact package a Refrigeration system before being sent to evaporator ( )! 2 stage compressor draws its gas with intercooler over single stage compression with intercooling efficient and flexible for! Used in conjunction with two stage compression with intercooling liquid in the separate stages pressure compressor at point 2 in! To the next stage ambient air air Conditioning, Topic: - Vapor compression system! The specific volume can be reduced by reducing the temperature compressing a gas compressor it. Necessary to use a two-stage compression is done in more than one stage and each. Pressure ratios in the process of reducing and maintaining the temperature of the exhaust valve into the intercooler question... Results in lower pressure ratios in the process of expanding separated from liquid refrigerant from sub-cooler is now passed water... Or more compressors in series, i.e gas removal, booster discharge-vapor,... To the next stage intercooler pressure p2 temperature is becoming lower and lower Saturated... At top of the exhaust valve into the intercooler is a direct contact heat exchanger through!

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